Search found 28 matches

by John
Sun Jan 17, 2021 2:07 am
Forum: General Z80 Programming
Topic: Another rather newbie question
Replies: 4
Views: 97

Re: Another rather newbie question

Hi Nephesh, If you didn't understand Keith's explanation I will add a little more to it so maybe you can understand it. To convert a hex value to an ASCII letter first notice that in the ASCII table there is a gap, of size 7,between the two groups of characters 0 to 9 and A to F, this obviously sugg...
by John
Sat Jan 16, 2021 5:46 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX
Replies: 11
Views: 3664

Re: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX

I had a read of some of documentation screen 3. The screen three mode (as it is known in MSX BASIC) can have 16 colours on screen and each pixel in the the 68 by 48 screen can be set to any of the 16 colour without any restrictions. The common definition of bitmap means there is a one to one corresp...
by John
Fri Jan 08, 2021 6:39 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX
Replies: 11
Views: 3664

Re: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX

All right. Personally, to be frank, I would not sponsor you to do it-if that what your reply above may mean-because the reason but I am unable to do it, for now, is because I can't find any information,so far, on it on how to plot a screen 3. I can't find any information,so far, on it on how to plot...
by John
Sat Jan 02, 2021 12:17 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX
Replies: 11
Views: 3664

Re: Video: Lesson P5 - Bitmap graphics on the TI-83 and MSX

I did my own pixel plot function for the MSX1 in screen 2 a few months ago, and I used it for that basis of lines, then 3d wireframe models, but I found it was too slow for such 3d graphics. I came to the conclusion that coloured 3d wire frames graphics on MSX1 can be done at a good speed in MSX1 sc...
by John
Sun Dec 20, 2020 5:50 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P10 - Tilemap graphics on the MSX1
Replies: 7
Views: 4427

Is this another bug in Akusprite?-Or did I misunderstand something?

Hello Keith, This is regarding the Akusprite image conversion to MSX1 screen 2 (the 8x1 color node), when I am doing a conversion from akusprite , so akusprite generates the exported files .RAW and .RAW.COL, of the test image for MSX1 screen 2 in 8x1 color , the colors are not what I expected; the t...
by John
Sat Jul 18, 2020 4:21 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P31 - Hardware Sprites on the MSX1!
Replies: 22
Views: 7105

Re: Video: Lesson P31 - Hardware Sprites on the MSX1!

The problem I am having for completing a game is making Arkos Tracker 2 work properly I mention the problem at the page Video: Lesson P35 - Playing Digital Sound with WAV on the AY! I guess the issue is CBIOS differs from the real MSX 1 BIOS in a way that makes Arkos tracker 2 fail on a real MSX 1 (...
by John
Fri Jul 17, 2020 11:46 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P31 - Hardware Sprites on the MSX1!
Replies: 22
Views: 7105

Re: Video: Lesson P31 - Hardware Sprites on the MSX1!

"Unless you have some clever ideas to exploit this (like objects that move with the screen - staying in their 3rd)" I have though about this again. I do not think you need clever ideas to do vertical scrolling if that is what you meant in your video lesson P52 (https://youtu.be/pobGYc2iPfE...
by John
Wed Jul 15, 2020 1:57 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P10 - Tilemap graphics on the MSX1
Replies: 7
Views: 4427

Bug in Akusprite conversion to MSX tiles?

Hello Keith, I think there may be a bug in akusprite. So I have a 16x16 BMP test image (imagetoconverttomsxtiles.bmp in the zip file attached) to convert to MSX 8 by 8 pixel tiles,with 8 bytes in a tile to demonstrate the problem; thes test image is also shown as a png image in this message. The pro...
by John
Tue Jul 14, 2020 6:22 pm
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P31 - Hardware Sprites on the MSX1!
Replies: 22
Views: 7105

Re: Video: Lesson P31 - Hardware Sprites on the MSX1!

"If you can't keep your program below 16k, I think one way or another you're going to have to learn about bank switching." Now I understand how to do bank switching and hence I am paging in the required 16K memory to show the screen. So I can now show the desired background image using all...
by John
Tue Jul 07, 2020 9:36 am
Forum: MSX & MSX2 Assembly Programming
Topic: Video: Lesson P18 - Making Sound with the AY
Replies: 2
Views: 3135

Re: Video: Lesson P18 - Making Sound with the AY-Bug in Chibisound?

Hello Keith, This question is regarding your Chibisound described at https://www.chibiakumas.com/z80/platform2.php for the MSX 1 you describe loading the mixer register,which is register 7, with the value --NNNTTT. Don't you need to set bit 7 to 1 and bit 6 to 0 when setting the mixer register (regi...

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